Alumnium becomes passive in
Conc: HNO3
H2CrO4
HCIO4
All
Which of the following statements is correct?
BCI3 and AICI3 are both Lewis acids and BCI3 is stronger than AICI3
BCI3 and AICI3 are both Lewis acids and AICI3 is stronger than AICI3
BCI3 and AICI3 are both equally strong Lewis acids
Both BCI3 and AICI3 are not Lewis acids
Which of the following sublimes on heating?
AIF3
AICI3
AIBr3
AII3
The type of hybridization of boron in diborane is
sp
sp2
sp3
sp3d2
“Ammonal” used in bombs is a mixture of
AI + NH4NO3
AI + AI2O2 + B2O3
Ag2O3
AI2O3 + C
Which of the following is not correct in case of boron nitride, BN?
It is a good insulator
It is hard because in one of the modifications it has diamond (zinc blende) like structure
It shows magnetc properties
It is chemically unreactive
Inorganic graphite is
B2O3
BN
B4C
B3N3H6
Which of the flowing is most abundant among group 13 elements in the earth’s crust?
B
AI
Ga
In
Borazole is known as
Organic benzene
Organic compound
Inorganic compound
Inorganic benzene
Rubles and sapphire are chemically
AI2O3
AI2O3 + Ag2O3
Ag2O + Au2O3
